code.hljs {
  padding: 8px 2px;
  border-radius: 5px;
  position: relative;
  ol {
    list-style: decimal;
    margin: 0;
    margin-left: 40px;
    padding: 0;
    li {
      list-style: none;
      position: relative;
      padding-left: 10px;
      .line-num {
        position: absolute;
        left: -40px;
        top: 0;
        width: 40px;
        height: 100%;
        border-right: 1px solid rgba(0, 0, 0, 0.66);
        text-align: center;
      }
    }
  }
}
